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Acquire newly updated <strong>Questions</strong> and Answers of <strong>QNT</strong> <strong>561</strong> <strong>Final</strong> <strong>Exam</strong>.<br />
1. A random sample of size 15 is selected from a normal population. The population standard<br />
de<strong>via</strong>tion is unknown. Assume the null hypothesis indicates a two-tailed test and the researcher<br />
decided to use the 0.10 significance level. For what values of t will the null hypothesis not be<br />
rejected?<br />
a. To the left of -1.645 or to the right of 1.645<br />
b. To the left of -1.345 or to the right of 1.345<br />
c. Between -1.761 and 1.761<br />
d. To the left of -1.282 or to the right of 1.282<br />
2. Which of the following is a characteristic of the F distribution?<br />
a. Normally distributed<br />
b. Negatively skewed<br />
c. Equal to the t-distribution<br />
d. Positively skewed<br />
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3. For a chi-square test involving a contingency table, suppose the null<br />
hypothesis is rejected. We conclude that the two variables are __________.<br />
a. related<br />
b. curvilinear<br />
c. linear<br />
d. not related<br />
4. A sales manager for an advertising agency believes that there is a<br />
relationship between the number of contacts that a salesperson makes and<br />
the amount of sales dollars earned. What is the dependent variable?<br />
a. sales managers<br />
b. amount of sales dollars<br />
c. salesperson<br />
d. number of contacts
5. Which of the following is most appropriately displayed with a frequency table?<br />
a. What percentage of people prefer Hunt's brand ketchup<br />
b. The home location of the most valuable customers<br />
c. How much explanatory value comes from the study's variables<br />
d. The relationship between gender and job performance<br />
6. The manager of Paul's fruit and vegetable store is considering the purchase of a new seedless<br />
watermelon from a wholesale distributor. Since this seedless watermelon costs $4, will sell for $7,<br />
and is highly perishable, he only expects to sell between six and nine of them. What is the<br />
opportunity loss for purchasing nine watermelons when the demand is for seven watermelons?<br />
a. 8<br />
b. 4<br />
c. 12<br />
d. 0<br />
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7. A firm offers routine physical examinations as part of a health service program for its<br />
employees. The exams showed that 8% of the employees needed corrective shoes, 15% needed<br />
major dental work, and 3% needed both corrective shoes and major dental work. What is the<br />
probability that an employee selected at random will need either corrective shoes or major dental<br />
work?<br />
a. .25<br />
b. 1.00<br />
c. .50<br />
d. .20<br />
8. When data is collected using a qualitative, nominal variable, what is true about a frequency<br />
distribution that summarizes the data?<br />
a. The upper and lower class limits must be calculated.<br />
b. The number of classes is equal to the number of variables plus 2.<br />
c. The “5 to the k rule” can be applied.<br />
d. A pie chart can be used to summarize the data.<br />
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9. If an ANOVA test is conducted and the null hypothesis is rejected, what does this indicate?<br />
a. The p-value is less than a.<br />
b. All population means are different.<br />
c. At least one pair of population means is different.<br />
d. The population means are equal.<br />
10. A random sample of 20 items is selected from a population. When computing a confidence<br />
interval for the population mean, what number of degrees of freedom should be used to determine<br />
the appropriate t-value?<br />
a. 25<br />
b. 21<br />
c. 19<br />
d. 20<br />
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11. The question, "Should products be withdrawn if even one death is associated with its prescribed<br />
use, even if no fault for the tampered product accrues to the manufacturer?" is an example of a(n)<br />
_____.<br />
a. strip data mining issue<br />
b. unresearchable question<br />
C. ill-defined problem<br />
d. favored-technique problem<br />
12. A large department store examined a sample of the 18 credit card sales and recorded the amounts<br />
charged for each of three types of credit cards: MasterCard, Visa, and Discover. Six MasterCard sales,<br />
seven Visa, and five Discover sales were recorded. The store used an ANOVA to test if the mean sales<br />
for each credit card were equal. What are the degrees of freedom for the F statistic?<br />
a. 2 in the numerator, 15 in the denominator<br />
b. 6 in the numerator, 15 in the denominator<br />
c. 18 in the numerator, 3 in the denominator<br />
d. 3 in the numerator, 18 in the denominator<br />
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13. A linear trend equation is used to represent time series values when the data are changing by<br />
equal what?<br />
a. amounts<br />
b. percents and proportions<br />
c. proportions<br />
d. percents<br />
14. Which of the following goals should a good survey instrument accomplish?<br />
a. Encourage each participant to provide accurate responses<br />
b. Encourage participants to be succinct in their responses<br />
c. Encourage participants to answer only those questions they are comfortable answering<br />
d. Encourage participants to end the survey when they feel they have contributed enough<br />
information<br />
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15. Kroger, a grocery store chain, wants to identify the ideal store layout for increasing store sales. Because it<br />
primarily uses two store designs, one a grid layout with vertical aisles divided by a center aisle and another<br />
using a traditional straight-aisle pattern, Kroger will match pairs of stores that have different designs but similar<br />
shopper demographics and location. Sales from each pair will then be compared to determine if store design is<br />
related to sales. Which type of study is this an example of?<br />
a. Exploratory study<br />
b. Case study<br />
c. Ex post facto study<br />
d. Longitudinal study<br />
16. Bones Brothers & Associates prepare individual tax returns. Over prior years, Bones Brothers has<br />
maintained careful records regarding the time to prepare a return. The mean time to prepare a return is 90<br />
minutes and the standard de<strong>via</strong>tion of this distribution is 14 minutes. Suppose 100 returns from this year are<br />
selected and analyzed regarding the preparation time. What assumption do you need to make about the shape of<br />
the population distribution of all possible tax preparation times to make inferences about the mean time to<br />
complete a tax form?<br />
a. The population distribution is skewed to the left.<br />
b. The population distribution is skewed to the right.<br />
c. The shape of the population distribution does not matter.<br />
d. The population distribution is normal.<br />
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17. Checklists with several items to be considered by respondents may be subject to<br />
_____.<br />
a. recency effects<br />
b. leniency effects<br />
c. halo effects<br />
d. primacy effects<br />
18. In a multiple rating list scale, ____.<br />
a. participants rate multiple items on a 3-point scale<br />
b. the participant is restricted to circling their rating<br />
c. it is possible to visualize the results better than with other numerical scales<br />
d. the data generated are always ordinal
19. As the size of the sample increases, what happens to the shape of the distribution of sample<br />
means?<br />
a. It cannot be predicted in advance<br />
b. It is positively skewed<br />
c. It is negatively skewed<br />
d. It approaches a normal distribution<br />
20. For any chi-square goodness-of-fit test, the number of degrees of freedom is found by ______.<br />
a. n + k<br />
b. k -1<br />
c. n – k - 1<br />
d. n + 1<br />
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21. BankChoice is concerned about stagnating profits and asks, "How can profitability be<br />
improved?" This is an example of a(n) _____.<br />
a. research question<br />
b. measurement question<br />
c. management question<br />
d. investigative question<br />
22. A machine is set to fill the small-size packages of M&M candies with 56 candies per bag. A<br />
sample revealed three bags of 56, two bags of 57, one bag of 55, and two bags of 58. To test the<br />
hypothesis that the mean candies per bag is 56, how many degrees of freedom are there?<br />
a. 1<br />
b. 7<br />
c. 9<br />
d. 8<br />
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23. An experimental study is one that _____.<br />
a. attempts to reveal why or how one variable produces changes in another<br />
b. involves manipulation of one or more variables to determine the effect on another variable<br />
c. attempts to capture a population's characteristics by making inferences from a sample's<br />
characteristics and testing resulting hypotheses<br />
d. discovers answers to the questions who, what, when, where, or how much<br />
24. The monthly salaries of a sample of 100 employees were rounded to the nearest $10. They<br />
ranged from a low of $1,040 to a high of $1,720. If we want to condense the data into seven<br />
classes, what is the most convenient class interval?<br />
a. $200<br />
b. $50<br />
c. $150<br />
d. $100<br />
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25. Consider a regression analysis, where the correlation coefficient is 0.18. Then, the coefficient<br />
of determination is _______.<br />
a. .0324<br />
b. .36<br />
c. 1.16<br />
d. .424<br />
26. In multiple regression analysis, when the independent variables are highly correlated, this<br />
situation is called __________________.<br />
a. homoscedasticity<br />
b. curvilinearity<br />
c. multicollinearity<br />
d. autocorrelation<br />
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27. Sam's Club installed self-checkout stations that can track not only member's purchases but<br />
also packaging problems, as the system uses universal product codes to match the item the<br />
shopper has in their cart with its price and inventory level in the store, generating a spreadsheet<br />
style report for the researcher. If you consider the scanner as the tool for collecting data for Sam's<br />
researchers, they are doing data entry by ____.<br />
a. spreadsheet<br />
b. Optical Character Recognition<br />
c. Field editing<br />
d. Voice recognition<br />
28. The weekly incomes of a large group of executives are normally distributed with a mean of<br />
$2,000 and a standard de<strong>via</strong>tion of $100. What is the z-score for an income of $2,100?<br />
a. 1.683<br />
b. 0.90<br />
c. 2.00<br />
d. 1.00<br />
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29. A ranking scale is a scale that _____.<br />
a. scores an object without making a direct comparison to another object<br />
b. groups participants<br />
c. groups concepts according to specific criteria<br />
d. scores an object by making a comparison and determining order among two or more objects<br />
30. What is the interpretation of a 96% confidence level?<br />
a. The interval contains 96% of all sample means.<br />
b. Approximately 96 out of 100 such intervals would include the true value of the population<br />
parameter.<br />
c. There's a 96% chance that the given interval includes the true value of the population<br />
parameter.<br />
d. There's a 4% chance that the given interval does not include the true value of the population<br />
parameter.<br />
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